One question re. respawning - is it the same loot in a particular location as previously ? In Halted Stream Camp I'm pretty sure it's the same stuff as the first time I visited. Which is wrong ! if it was different loot and different NPCs then fine, I could buy the 'someone new moved in' idea, but the same stuff coming back is just silly !
I've tried those two mods, and I guess they only work from now i.e. any previously cleared locations which have already respawned will stay that way, it's only further respawning which is now disabled in my game ?
The equipment and the loot from the containers is generatad from a list. The same applied to some of the placed items and the faces, races and gender also changes from one spawn to the other. So you can suspend your disvelief.
No location is respawned until your return. So, If the respawn is set to 30 days and you have cleared a place 180 days ago and then install that mod, when your return all you will find are corpses. The places you have already revisited and you avandoned then without killing all of the new ocupants won't be cleared because of this mod though.